<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表 </el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card class="box-card">
      <!--1. 为ECharts准备一个具备大小（宽高）的Dom -->
      <div id="main" style="width: 700px; height: 500px" ref="echartsRef"></div>
    </el-card>
  </div>
</template>

<script type="text/ecmascript-6">
// 0.导入echarts
import * as echarts from "echarts";
import merge from "lodash/merge";
import { reqreportsInfo } from "../../api";
export default {
  data() {
    return {
      // echarts数据源
      reportsInfo: {},
      // 需要合并的数据  他要和reportsInfo合并成一个数据对象
      options: {
        title: {
          text: "用户来源",
        },
        tooltip: {
          trigger: "axis",
          axisPointer: {
            type: "cross",
            label: {
              backgroundColor: "#E9EEF3",
            },
          },
        },
        grid: {
          left: "3%",
          right: "4%",
          bottom: "3%",
          containLabel: true,
        },
        xAxis: [
          {
            boundaryGap: false,
          },
        ],
        yAxis: [
          {
            type: "value",
          },
        ],
      },
    };
  },
  mounted() {
    this.getReportsInfo();
  },
  methods: {
    async getReportsInfo() {
      const result = await reqreportsInfo();
      if (result.meta.status != 200) return this.message.error(result.meta.msg);
      this.reportsInfo = result.data;
      console.log(result);
    },
  },
  watch: {
    reportsInfo(newValue) {
      // 当页面dom加载完后 在创建echarts对象
      this.$nextTick(() => {
        //2. 基于准备好的dom，初始化echarts实例
        const myChart = echarts.init(this.$refs.echartsRef);

        //3. 指定图表的配置项和数据
        // 发请求获取数据源
        // 合并一一下数据源
        const option = merge(newValue, this.options);
        //4. 使用刚指定的配置项和数据显示图表。
        myChart.setOption(option);
      });
    },
  },
};
</script>

<style lang="less" scoped>
</style>